Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses one significant behavioral trait — the call is non-blocking and safe to invoke during a long solve — plus that status is "persistent." It does not address permissions, error behavior, or what happens for an unknown/expired job id, leaving real gaps for a no-annotation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.